syzkaller login: [ 38.702874] BUG: Bad rss-counter state mm:00000000e5124be1 type:MM_FILEPAGES val:33 [ 38.703885] BUG: Bad rss-counter state mm:00000000e5124be1 type:MM_ANONPAGES val:22 [ 38.866300] ================================================================== [ 38.867190] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.868133] Read of size 8 at addr ffff888019dffb38 by task sshd/227 [ 38.868906] [ 38.869123] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.870058] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.871033] Call Trace: [ 38.871355] [ 38.871643] dump_stack_lvl+0x91/0xf0 [ 38.872177] print_report+0xcc/0x620 [ 38.872663] ? __virt_addr_valid+0x102/0x340 [ 38.873216] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.873832] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.874445] kasan_report+0xbe/0xf0 [ 38.874918] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.875537] vma_interval_tree_remove+0xc75/0xec0 [ 38.876152] vma_prepare+0xc54/0x11a0 [ 38.876634] __split_vma+0x5af/0x950 [ 38.877118] ? __pfx___split_vma+0x10/0x10 [ 38.877661] ? find_held_lock+0x2c/0x110 [ 38.878198] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.878772] ? lock_is_held_type+0x9f/0x120 [ 38.879314] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.879938] ? mtree_range_walk+0x632/0x900 [ 38.880491] ? mas_walk+0x5c7/0x7c0 [ 38.880980] do_vmi_munmap+0x1f1/0x2b0 [ 38.881477] mmap_region+0x1f9/0x2660 [ 38.881965] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.882483] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.883204] ? __pfx_lock_acquire+0x10/0x10 [ 38.883763] ? __pfx_mmap_region+0x10/0x10 [ 38.884305] ? security_mmap_addr+0x7d/0xa0 [ 38.884846] ? get_unmapped_area+0x1f5/0x3f0 [ 38.885405] do_mmap+0x854/0xf00 [ 38.885851] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.886345] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.886918] ksys_mmap_pgoff+0x3af/0x500 [ 38.887423] do_syscall_64+0x3f/0x90 [ 38.887915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.888573] RIP: 0033:0x7fa99174fd82 [ 38.889041] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 38.891214] RSP: 002b:00007ffc0e5644c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.892164] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa99174fd82 [ 38.893026] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa990b89000 [ 38.893874] RBP: 00007fa990b89000 R08: 0000000000000009 R09: 0000000000001000 [ 38.894736] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563d4b5ddec0 [ 38.895608] R13: 00007ffc0e5644e0 R14: 00007ffc0e564510 R15: 00007ffc0e564870 [ 38.896491] [ 38.896784] [ 38.897003] Allocated by task 220: [ 38.897442] kasan_save_stack+0x22/0x50 [ 38.897948] kasan_set_track+0x25/0x30 [ 38.898445] __kasan_slab_alloc+0x59/0x70 [ 38.898976] kmem_cache_alloc+0x16b/0x370 [ 38.899490] vm_area_dup+0x20/0x160 [ 38.899948] __split_vma+0x170/0x950 [ 38.900412] split_vma+0xc6/0x110 [ 38.900855] mprotect_fixup+0x8d2/0xb30 [ 38.901365] do_mprotect_pkey+0x87e/0xd40 [ 38.901894] __x64_sys_mprotect+0x78/0xc0 [ 38.902418] do_syscall_64+0x3f/0x90 [ 38.902900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.903555] [ 38.903790] Freed by task 220: [ 38.904180] kasan_save_stack+0x22/0x50 [ 38.904689] kasan_set_track+0x25/0x30 [ 38.905189] kasan_save_free_info+0x2b/0x50 [ 38.905718] __kasan_slab_free+0x10a/0x190 [ 38.906255] kmem_cache_free+0x10d/0x4d0 [ 38.906771] rcu_core+0x8c8/0x2860 [ 38.907232] __do_softirq+0x1b7/0x7d4 [ 38.907730] [ 38.907942] Last potentially related work creation: [ 38.908525] kasan_save_stack+0x22/0x50 [ 38.909035] __kasan_record_aux_stack+0x8e/0xa0 [ 38.909620] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.910272] remove_vma+0x139/0x170 [ 38.910736] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.911303] do_vmi_munmap+0x1f1/0x2b0 [ 38.911827] __vm_munmap+0x138/0x3a0 [ 38.912296] __x64_sys_munmap+0x59/0x80 [ 38.912792] do_syscall_64+0x3f/0x90 [ 38.913277] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.913934] [ 38.914146] The buggy address belongs to the object at ffff888019dffae0 [ 38.914146] which belongs to the cache vm_area_struct of size 168 [ 38.915630] The buggy address is located 88 bytes inside of [ 38.915630] freed 168-byte region [ffff888019dffae0, ffff888019dffb88) [ 38.917057] [ 38.917276] The buggy address belongs to the physical page: [ 38.917956] page:00000000503c8d6f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19dff [ 38.919059] memcg:ffff888009645301 [ 38.919490] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.920167] page_type: 0xffffffff() [ 38.920620] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.921557] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009645301 [ 38.922489] page dumped because: kasan: bad access detected [ 38.923158] [ 38.923375] Memory state around the buggy address: [ 38.923973] ffff888019dffa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.924832] ffff888019dffa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.925700] >ffff888019dffb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.926577] ^ [ 38.927202] ffff888019dffb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.928115] ffff888019dffc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.928985] ================================================================== [ 38.929952] Disabling lock debugging due to kernel taint [ 40.949616] BUG: Bad rss-counter state mm:00000000d4de5feb type:MM_FILEPAGES val:33 [ 40.950572] BUG: Bad rss-counter state mm:00000000d4de5feb type:MM_ANONPAGES val:22 [ 41.465498] BUG: Bad rss-counter state mm:00000000a18bb290 type:MM_FILEPAGES val:33 [ 41.466574] BUG: Bad rss-counter state mm:00000000a18bb290 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48986' (ECDSA) to the list of known hosts. 2023/06/20 12:35:16 fuzzer started 2023/06/20 12:35:17 dialing manager at localhost:36067 2023/06/20 12:35:17 checking machine... 2023/06/20 12:35:17 checking revisions... [ 42.275705] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:35:17 testing simple program... [ 42.333208] cgroup: Unknown subsys name 'net' [ 42.405269] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:35:16 Registers: info registers vcpu 0 RAX=ffffffff863b9421 RBX=0000000000000001 RCX=ffffffff863b941c RDX=0000000000000000 RSI=0000000000000000 RDI=1ffffffff0c77284 RBP=ffff88801bf9f5a0 RSP=ffff88801bf9f4d8 R8 =ffffffff863b9420 R9 =ffff88801bf9f588 R10=0000000000038001 R11=000000000008b92e R12=ffff88801bf9f5a8 R13=ffff88801bf9f590 R14=ffff88801bf9f9c0 R15=ffff88801bf9f548 RIP=ffffffff81131127 RFL=00000216 [----AP-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f62ac7e7900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f62acd9e618 CR3=000000000dbae000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f9eacfeb200 CR3=000000000c9ae000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=5dfd4fad5196738e414cae10747becca XMM02=000000000011ad18ec2efd57dc4c00df XMM03=00000000001216b8e3129e4f959b1703 XMM04=3ca9feefbfcc68d300000000000ae988 XMM05=0b39c798a71319b600000000001312c8 XMM06=8fede82a5ad58cbe0000000000131150 XMM07=e042d86d42eb936e0000000000121938 XMM08=e3129e4f959b1703000000000011ad78 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000